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Description: This paper presents various applications of a nonlinear
adaptive notch filter which operates based on the concept
of an enhanced phase-locked loop (PLL). Applications of the filter
for online signal analysis for power systems protection, control and
power quality enhancement are presented. The proposed scheme
can be applied for signal analysis both under stationary and nonstationary
conditions. Based on digital time-domain simulations,
applications of the filter for a) sinusoidal waveform peak detection,
b) harmonic identification/detection, c) detection/extraction
of individual components of a signal, d) instantaneous reactive
current extraction, e) disturbance detection, f) noise reduction in
zero-crossings detection, and g) amplitude (phase) demodulation
for flicker estimation, are presented.
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Size: 153503 |
Author: yangyansky |
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Description: 一些图像处理的方法实现，其中滤波采用了propoesd filter,这种算法比起中值滤波和peak&valley filter有很多优势-Some image processing method, which uses filtering propoesd filter, this algorithm than the median filter and the peak
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Size: 1240064 |
Author: gaoyuan |
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Description: 脉冲滤波算法，对因环境干扰引起的尖峰脉冲能够有效的虑掉，在单片机中，既能实现又能提高执行效率，不一个不错的代码。我以多次使用，如C8051F060,C8051F040,C8051F410,C8051F320中。-Pulse filtering algorithm, due to environmental interference caused by pulse peak can be effectively out of consideration, in the MCU, it can realize the implementation can enhance efficiency, not a good code. I have repeatedly used, such as the C8051F060, C8051F040, C8051F410, C8051F320 in.
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Size: 1024 |
Author: 蔡新林 |
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Description: 一维序列中峰值提取//Data为待分析的数组；peak为排序后的数组；
//m 为Data数组大小；n 为peak数组的大小。
//m_Min 为Data数组中最小值
//假设峰值个数PN>n
-One-dimensional sequence in the peak extraction// Data for the array to be analyzed peak for the array after sorting // m for the Data array size n for the peak size of the array.// m_Min minimum value for the Data array// assume that the peak number of PN
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Size: 1024 |
Author: 小何 |
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Description: 在许多的数据采集系统中，现场的强电设备较多，不可避免
地会产生尖脉冲干扰,这种干扰一般持续时间短，峰值大，对这样
的数据进行数字滤波处理时，仅仅采用算术平均或移动平均滤波
时，尽管对脉冲干扰进行了1/n的处理，但，其剩余值仍然较大。
这种场合最好的策略是：将被认为是受干扰的信号数据去掉，这
就是防脉冲干扰平均值滤波法的原理。-In many data acquisition system, the strong electrical equipment at the scene more, will inevitably produce a sharp pulse interference, such interference generally short duration, peak, and data on such digital filter processing, only the use of arithmetic mean or moving average filter, although carried out on the pulse interference 1/n the treatment, but its residual value is still larger. Such occasions, the best strategy is: would be considered interference signal data removed, and that is anti-pulse interference principle average filtering method.
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Size: 4096 |
Author: 倪晨 |
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Description: IIR一阶低通滤波器
一阶高通滤波器
Notch 嵌波滤波器
Peak 滤波器
IIR低通滤波（Butterworth）
IIR高通滤波（Butterworth）
IIR带通滤波（Butterworth）
IIR带阻滤波（Butterworth）
IIR低通滤波（chebyshev 1）
IIR低通滤波（chebyshev 1）
chebyshev 中用到的函数 cheby.m-First-order IIR low-pass filter the first-order high-pass filter Notch filter inlay Peak wave filter IIR low-pass filter (Butterworth) IIR high-pass filtering (Butterworth) IIR band-pass filter (Butterworth) IIR band-stop filter (Butterworth) IIR low-pass filter (chebyshev 1) IIR low-pass filter (chebyshev 1) chebyshev function used cheby.m
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Size: 7168 |
Author: Kelsey |
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Description: calculate the band of Fabry-Parot Filter -A Fabry-Parot Filter consist of the cavity formed by two highly reflective mirrors placed parallel to each other , as shown in the figure 1.The input light beam to the filter enters the first mirror at right angles to its surface. The output of the filter is the light beam leaving the second mirror. This filter is called Fabry-Parot or etalon. This is a classical device that has been used widely in interferometric applications. Fabry-Parot filters have been used for WDM in several optical network test beds. There are better filters today, such as thin film resonant multi cavity filter and they can still be viewed as Fabry-Perot filter. This type of filter transmits a narrow band of wavelengths and rejects wavelengths outside of that band. An interesting feature of this type of filter is its ability to "select" a different peak wavelength as the filter is tilted
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Size: 1024 |
Author: mengbo |
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Description: 通过采用神经网络中的Clipping方法和MonteCarlo修改学习算法，对用于光学模式识别的纯相位二值化匹配滤波器进行了优化设计。计算机模拟结果表明，和传统的纯相位匹配滤波器的相关输出结果相比，其识别输出的信噪比和信号相关峰值得到了明显的提高，从而为今后的光学实现奠定了良好的基础。-Through the use of neural network methods and MonteCarlo modify Clipping learning algorithm for optical pattern recognition of binary phase-only matched filter optimized design. Computer simulation results show that the traditional phase-only matched filter correlation output compared with the results, which identify the output signal to noise ratio and signal correlation peak has been significantly improved, so as to achieve the future optical laid a good foundation.
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Size: 323584 |
Author: 刘杰 |
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Description: 峰谷滤波的C++实现 峰谷滤波对超声图像处理有很好的边缘处理作用-Peak and valley filter C++, peak and valley filter on the ultrasound images have a good deal with the role of the edge
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Size: 6077440 |
Author: aijinqin |
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Description: peak filter design for audio signal
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Size: 1024 |
Author: Ozan |
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Description: 本论文概述了信号检测技术，如能量检测、匹配滤波器检测等，重点研究了循
环平稳检测法，并与能量检测法进行性能对比，仿真表明循环平稳检测性能明显
优于能量检测。论文讨论了循环平稳检测法检测统计量的选取，研究了循环谱峰
均比的特性，并对使用循环谱峰均比作为检测统计量的循环平稳检测法进行了仿
真，仿真表明使用循环谱峰均比作为检测统计量的循环平稳检测性能优于传统的
循环平稳检测法。-This paper outlines the signal detection techniques, such as energy detection, matched filter detection, focusing on the cyclostationary detection method and detection method and energy performance comparison, simulations show that the cyclostationary detection performance was significantly better than the energy detection. Paper discusses the detection assay cyclostationary statistics of the selected peak of the cycle than the characteristics and use of cycle peaks than as a test statistic of cyclostationary detection for simulation, the simulations show that the use of cycle peaks than as a test statistic of cyclostationary detection performance is superior to conventional cyclostationary detection.
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Size: 2318336 |
Author: 贾琼 |
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Description: 滤波器广泛应用于数字信号处理、通信、自动控制领域,但设计可变宽频带有源滤波器则比较困难。利用单片机控制参数可编程的双二阶通用开关电容有源滤波器,精确设置有源滤波器的中心频率f，品质因数Q及有源滤波器的工作方式。本系统主要分为两个部分:即程控滤波器和程控放大器。程控放大器电压增益为40dB，通过单片机控制DA进行分压，可精确实现要求的10dB步进，误差小于0.5 ，通带为100Hz-500KHz，输入电压峰－峰值范围为10mV，在输入范围内无明显失真。由MAX264为核心的滤波器，可设置为高通、低通滤波器。通过单片机直接给出控制频率，使-3dB截止频率在1KHz-20KHz内可调，步进1KHz，误差小于1 。整个系统以52单片机为控制核心，电路简单，性能稳定，且具有较高精度，滤波参数调节通过单片机控制，较为方便。-Filters are widely used in digital signal processing, communications, automatic control area, but the design variable wideband active filter is more difficult. Control parameters using single-chip programmable universal switched-capacitor biquad active filter, active filter accurately set the center frequency f, quality factor Q and the active filter works. The system is mainly divided into two parts: the program-controlled filters and programmable amplifiers. Programmable amplifier voltage gain of 40dB, the DA through the partial pressure of single-chip control, can accurately achieve the required 10dB step, the error is less than 0.5 , passband to 100Hz-500KHz, input voltage peak- the range of 10mV, the input range no significant distortion. By the MAX264 as the core of filter can be set to high pass, low pass filter. Given directly by the microcontroller controls the frequency, the-3dB cutoff frequency at 1KHz-20KHz adjustable, step 1KHz, error is less than 1 . The entire system for
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Size: 1635328 |
Author: 黄倩 |
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Description: Initialize a quasi peak filter instance.
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Size: 1024 |
Author: lofanggen |
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Description: The process applies band pass filters to the signal. Each output / / feeds a quasi peak filter for level detection.
-The process applies band pass filters to the signal. Each output / / feeds a quasi peak filter for level detection.
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Size: 2048 |
Author: vugavong |
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Description: 根据 零中频正交解调原理 ，设计并制作 一个 双端口网络频率特性测试 仪，包 括幅频特性 和相频特性制作 一个 正交 扫频信号源 。
（1）频率范围为 1MHz ~40 MHz ，频率稳定度 ≤10 -4；频率可设 置，最小置单位 100kHz 。
（2）正交信号相位 差误差 的绝对值 ≤5， 幅度平衡误差 的绝对值 ≤5 。
（3）信号 电压的 峰值 ≥1V ，幅度平坦 度≤5 。
（4）可扫频 输出 ，扫频 范围及频率步进 值可设置，最小范围及频率步进 值可设置，最小100kHz ；要求 连续扫频输出，一次时间 ≤2s 。-According to the principle of zero-IF quadrature demodulation, design and production of a dual-port network frequency characteristics tester, including amplitude-frequency characteristic and phase-frequency characteristics make an orthogonal frequency sweep signal source. (1) the frequency range of 1MHz ~ 40 MHz, a frequency stability of ≤ 10-4 frequency can be set to the minimum setting unit 100kHz. (2) the absolute value of the quadrature phase error signal of ≤ 5, the absolute value of the amplitude balance error ≤ 5 . Peak (3) the signal voltage ≥ 1V, the amplitude flatness ≤ 5 . (4) be swept output frequency sweep range and step value can be set to the minimum range and frequency step value can be set to a minimum 100kHz requiring continuous sweep output, a time ≤ 2s.
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Size: 120832 |
Author: 涛 |
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Description: 峰值滤波用于数据特征处理，可提高算法运算速度和鲁棒性-Peak filter characteristics for data processing, the operation speed can be increased and the robustness of the algorithm
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Size: 16384 |
Author: 张磊 |
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Description: 先用butter filter去除噪音，再找到信号峰，对峰描叙的条件可以自行调整-butter filtering, and peak finding
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Size: 253952 |
Author: wuyanru |
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Description: 以峰值滤波器零、极点的品质因数及零、极点的模拟角频率为为原型函数，对峰值均衡的实际值与理论值进行仿真-In order to simulate the quality factor of zero and pole peak filter and zero pole angular frequency as the prototype function, the peak balance of the actual value of the simulation and theoretical values
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Size: 3072 |
Author: 戴海洋 |
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Description: ECG訊號透過 FFT 去基線後計算心率(The ECG signal calculates the heart rate by FFT filter)
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Size: 40960 |
Author: mmchen
|
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Description: The file contains MATLAB as well as C code implementation of ECG data filtering and its heartbeat rate calculation by detecting R peaks or S peaks.
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Size: 212992 |
Author: rk800506 |
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